You are reading the website of the 2015 edition of the competition, which ended on Wednesday 13th May at 11:59 pm. We are planning to run a new edition next year, to start in January 2016. The website for that new edition appears in December here. If you would like to receive a reminder around that time by email please look here. For any particular enquiries you can contact us on cryptography_competition@manchester.ac.uk.